foo.cc: In function ‘int main()’:
foo.cc:14:30: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long long int*’ [-Wformat=]
   14 |         while(std::scanf("%d%d%s",&country[cnt+1].size,&country[cnt+1].dis,country[cnt+1].name)!=EOF) ++cnt;
      |                             ~^                         ~~~~~~~~~~~~~~~~~~~
      |                              |                         |
      |                              int*                      long long int*
      |                             %lld
foo.cc:19:37: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses]
   19 |                 if(sum[i]>=(sum[cnt]+1>>1)){
      |                             ~~~~~~~~^~
foo.cc:17:13: warning: ‘id’ may be used uninitialized [-Wmaybe-uninitialized]
   17 |         int id;
      |             ^~